<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>index</title>
</head>
<body>

<form action="/form" method="post">
  <div>
    用户名：
    <input type="text" name="username">
  </div>

  <div>
    密码：
    <input type="password" name="password">
  </div>

  <div>
    <input type="submit" value="提交">
  </div>
</form>

</body>
</html>